Radar Tester Interview Question:

Explain me what is image frequency rejection in RF transceiver? What is the difference between homodyne and heterodyne architecture in RF Receiver?

Submitted by: Muhammad

The pair of frequencies which produce the same output at the output of the RF receiver are referred as images of each other. For example in C-band satellite receiver, 3700MHz and 5785 MHz produce the same 70MHz as output. Hence here 5785MHz is the image frequency for 3700MHz and vice versa, Refer RF measurements tutorial to know more about this and other RF measurements. Homodyne and heterodyne are the two main architectures used in RF receiver. Refer heterodyne receiver vs homodyne receiver to find the difference between them.
Submitted by: Muhammad